make sure FOR UPDATE queries are on master
make sure FOR UPDATE queries are on master

Change-Id: I89874d260cffbfa749779345b942a29a11e14b22
Reviewed-on: https://gerrit.instructure.com/23742
Reviewed-by: Brian Palmer <3cb4e1df5ec4da2c7c4af7c52cec8cf340a55a10@instructure.com>
Product-Review: Cody Cutrer <c4fe2b1d90ef8f2548c8aeabfa633434316f0305@instructure.com>
QA-Review: Cody Cutrer <c4fe2b1d90ef8f2548c8aeabfa633434316f0305@instructure.com>
Tested-by: Cody Cutrer <c4fe2b1d90ef8f2548c8aeabfa633434316f0305@instructure.com>

roxolan/canvas-lms,kyroskoh/canvas-lms,roxolan/canvas-lms,skmezanul/canvas-lms,samuels410/greatlakes-lms,whalejasmine/canvas-lms,shidao-fm/canvas-lms,kyroskoh/canvas-lms,fronteerio/canvas-lms,Rvor/canvas-lms,arrivu/qibla-ecampus,arrivu/jigsaw-lms,antoniuslin/canvas-lms,landonwilkins/canvas-lms,utkarshx/canvas-lms,redconfetti/canvas-lms,venturehive/canvas-lms,grahamb/canvas-lms,fronteerio/canvas-lms,antoniuslin/canvas-lms,utkarshx/canvas-lms,whalejasmine/canvas-lms,efrj/canvas-lms,sdeleon28/canvas-lms,roxolan/canvas-lms,samuels410/greatlakes-lms,efrj/canvas-lms,landonwilkins/canvas-lms,greyhwndz/canvas-lms,Unow/canvas-lms,skmezanul/canvas-lms,Unow/canvas-lms,juoni/canvas-lms,arrivu/jigsaw-lms,whalejasmine/canvas-lms,merichar/canvas-lms,wimemx/Canvas,samuels410/greatlakes-lms,antoniuslin/canvas-lms,whalejasmine/canvas-lms,ShreniiNepal/shrenii_lmp,landonwilkins/canvas-lms,merichar/canvas-lms,grahamb/canvas-lms,jay3126/canvas-lms,djbender/canvas-lms,jay3126/canvas-lms,samuels410/greatlakes-lms,arrivu/jigsaw-lms,kyroskoh/canvas-lms,venturehive/canvas-lms,greyhwndz/canvas-lms,wrdsb/canvas-lms,wimemx/Canvas,wrdsb/canvas-lms,ShreniiNepal/shrenii_lmp,shidao-fm/canvas-lms,wrdsb/canvas-lms,grahamb/canvas-lms,juoni/canvas-lms,greyhwndz/canvas-lms,wye0220/shindig-canvas,tgroshon/canvas-lms,leftplusrightllc/canvas-lms,redconfetti/canvas-lms,jay3126/canvas-lms,SwinburneOnline/canvas-lms,tgroshon/canvas-lms,HotChalk/canvas-lms,venturehive/canvas-lms,HotChalk/canvas-lms,SwinburneOnline/canvas-lms,arrivu/arrivu-lms,leftplusrightllc/canvas-lms,ShreniiNepal/shrenii_lmp,sfu/canvas-lms,sdeleon28/canvas-lms,Jyaasa/canvas-lms,HotChalk/canvas-lms,SwinburneOnline/canvas-lms,sfu/canvas-lms,Rvor/canvas-lms,sdeleon28/canvas-lms,va7map/canvas-lms,leftplusrightllc/canvas-lms,wimemx/Canvas,djbender/canvas-lms,skmezanul/canvas-lms,antoniuslin/canvas-lms,landonwilkins/canvas-lms,loganrun/pincan,arrivu/qibla-ecampus,arrivu/hoodemo,utkarshx/canvas-lms,shidao-fm/canvas-lms,ShreniiNepal/shrenii_lmp,grahamb/canvas-lms,arrivu/arrivu-lms,roxolan/canvas-lms,sfu/canvas-lms,leftplusrightllc/canvas-lms,HotChalk/canvas-lms,arrivu/hoodemo,tgroshon/canvas-lms,arrivu/qibla-ecampus,efrj/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,usmschuck/canvas,fronteerio/canvas-lms,arrivu/hoodemo,loganrun/pincan,tgroshon/canvas-lms,va7map/canvas-lms,juoni/canvas-lms,juoni/canvas-lms,utkarshx/canvas-lms,arrivu/arrivu-lms,kyroskoh/canvas-lms,redconfetti/canvas-lms,greyhwndz/canvas-lms,Jyaasa/canvas-lms,usmschuck/canvas,fronteerio/canvas-lms,Jyaasa/canvas-lms,merichar/canvas-lms,usmschuck/canvas,djbender/canvas-lms,sfu/canvas-lms,va7map/canvas-lms,redconfetti/canvas-lms,skmezanul/canvas-lms,venturehive/canvas-lms,sdeleon28/canvas-lms,shidao-fm/canvas-lms,wye0220/shindig-canvas,va7map/canvas-lms,sfu/canvas-lms,Unow/canvas-lms,loganrun/pincan,jay3126/canvas-lms,sfu/canvas-lms,Rvor/canvas-lms,grahamb/canvas-lms,wrdsb/canvas-lms,Rvor/canvas-lms,SwinburneOnline/canvas-lms,usmschuck/canvas,Jyaasa/canvas-lms,wye0220/shindig-canvas,efrj/canvas-lms